Microsoft has sent a revised proposal to the European Commission for the terms under which it will license Windows protocols to competitors to comply with last year's antitrust ruling against the company, a Microsoft spokesman said Monday. Microsoft believes it has addressed most of the concerns raised by European regulators, but the two sides continue to wrangle over half a dozen remaining issues, said Microsoft spokesman Tom Brookes.

They relate partly to how Microsoft's protocols can be distributed with open source products, he said. A Commission spokesman confirmed that Microsoft submitted its revisions in a letter last Thursday. The Commission is studying it closely to determine whether it meets its demands, said Commission spokesman Jonathan Todd. He did not rule out the possibility that Microsoft could still be fined $5 million per day for noncompliance.